I'm having trouble with my Mac Mini discovering my microphone. I'm using a Shure SM58 microphone connected to an ART Tube MP preamp, which is then connected to my Mac Mini via a 1/4 inch to a standard headphone sized jack. The cable I'm using is an iStudiolink cable, which are actually made for Macs. It's detected perfectly fine when connected to my PC, so I don't understand why I would be having problems on my Mac. I have an Intel Core 2 Duo 1.83GHz 1GB RAM Mac Mini. Ideas, or drivers I should download?